Preheat oven to 450 degrees F.,In a large bowl combine the flour, sugar, salt, baking powder, pepper, 1 cup of cheese, green onions and cream of tartar.,Using a pastry blender, cut in the cold butter until mixture resembles coarse crumbs.,Make a well in the center of the mixture and pour in the buttermilk all at once. Stir with a fork just until mixture is thoroughly moistened.,Dump the dough onto a lightly floured board and knead until the dough is barely smooth. This isn't a yeast dough; don't over knead it.,Pat it into a circle (doesn't have to be perfect) that's about 1/4 thick. Use a floured biscuit cutter to cut out rounds. Place them on a very lightly greased (cooking spray is fine) baking sheet. They should almost be touching. Gently re-roll the dough scraps and do the same with them.,______